Zoospore is

1. Formed by the fusion of two gametes

2. Flagellated and motile structure

3. The net result of sexual reproduction

4. Always diploid

Water hyacinth is also known as 'terror of Bengal' because it

1. Releases saxitoxin

2. Drains $O_2$ from the running water

3. Leads to death of fishes

4. Is one of the most invasive crop

All organisms have to reach a certain stage of growth and maturity in their life, before they can reproduce sexually. That period of growth

1. Is called the juvenile phase, not vegetative phase

2. Is called the vegetative phase, not the juvenile phase

3. While ends then marks the beginning of the reproductive phase

4. Is variable in the same organisms

Mark the odd one (with respect to zygote)

1. Formed in the water or inside the body of the organism

2. Develops a thick wall in all organisms

3. The vital link between the two generations

4. Divides by meiosis in the haplontic life cycle

Development of a new individual from a single gamete without fusion with another gamete is called

1. Parthenocarpy

2. Sporophytic budding

3. Parthenogenesis

4. Polyembryony

In most of the aquatic algae, syngamy occurs in the external medium. In this condition

1. Organism shows great synchrony between the sexes

2. The small number of gametes and produced

3. The female gamete is not released into the water

4. Male gamete should develop before the female gamete

Life span of an organism

1. Does not include the phase of senescence

2. Is not necessarily correlated with body size of organism

3. Is very short in a unicellular organism like Amoeba

4. Includes accidental death of organism also

The most vital event of sexual reproduction is

1. Fusion of gametes

2. Gamete formation

3. Gamete transfer

4. Release of gametes

Development of zygote into individuals of the new generation

1. Depends on the type of life cycle the organism has and the environment to which has and the environment it is exposed to

2. Is independent of the environment to which the organism is exposed

3. Always occurs through embryo formation

4. Never needs a period of rest before its germination

Identify the labels A, B and C in the given diagram

1. Tuber, Germinating eye bud, Eyes

2. Bulb, Node, Eyes

3. Rhizome, Node, Flower

4. Tuber, Internode, Adventitious buds